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The 49ers’ search to replace Jim Harbaugh is expected to last at least through week.

The 49ers are scheduled to interview Detroit Lions defensive coordinator Teryl Austin on Thursday and Arizona Cardinals defensive coordinator Todd Bowles on Friday, according to sources and multiple reports.

Austin, 49, and Bowles, 51, are on the list of the top minority coaching candidates the Fritz Pollard Alliance Foundation submitted to NFL teams with head-coaching openings. After the 49ers satisfy the requirements of the Rooney Rule, they are free to make a head-coaching hire.

On Sunday, the 49ers interviewed former New York Jets coach Rex Ryan in the Bay Area, CSNBayArea.com learned.

CEO Jed York, general manager Trent Baalke and president Paraag Marathe are conducting the search to replace Jim Harbaugh.

“This is going to be a search that we’re going to conduct with a small group of people involved -- a very small group -- and we’re going to spend the next several weeks interviewing -- seven to 10 days hopefully -- and hopefully be in a position to make a decision at that point in time,” Baalke said while appearing with York at a press conference last Monday, a day after the 49ers and coach Jim Harbaugh announced a mutual parting. “But we’re going to take as long as necessary to make sure that we have the right person in place.”

Austin just completed his first year as a defensive coordinator. He coached in Super Bowls with the Seattle, Arizona and Baltimore. He was the secondary coach on the Ravens team that defeated the 49ers in Super Bowl XLVII. The Lions’ defense under Austin ranks No. 2 overall in total yards behind Seattle and was third in the NFL in points allowed. Austin is scheduled to interview with the Atlanta Falcons on Wednesday.

Bowles has a history with the 49ers, playing 16 games for San Francisco as a free safety in 1991, one of his eight seasons in the NFL. He served as interim head coach of Miami in 2011, finishing with a 2-1 record after Tony Sparano was fired. Although the Cardinals ranked 24th in the NFL in total yards, his unit ranked fifth-best in points allowed per game. Bowles has interviews set up with the New York Jets on Wednesday, Atlanta on Friday, and Chicago on Saturday.

Here’s the list of candidates with whom the 49ers have conducted interviews or have interviews scheduled:

Vic Fangio, 49ers defensive coordinator, interviewed on Tuesday, Dec. 30
Dan Quinn, Seattle defensive coordinator, interviewed on Tuesday, Dec. 30
Mike Shanahan, ex-Washington, Denver, L.A. Raiders coach, interviewed on Thursday, Jan 1
Adam Gase, Denver offensive coordinator, interviewed on Friday, Jan. 2
Josh McDaniels, New England offensive coordinator, interviewed on Saturday, Jan. 3
Rex Ryan, ex-New York Jets coach, interviewed on Sunday, Jan. 4
Teryl Austin, Detroit defensive coordinator, scheduled to interview on Thursday
Todd Bowles, Arizona defensive coordinator, scheduled to interview on Friday